Draw the structure of the following atoms showing the nucleus containing - protons, neutrons and the orbits with the respective electrons : Carbon [At. no. 6, Mass no. = 12].

Draw the structure of the following atoms showing the nucleus containing - protons, neutrons and the orbits with the respective electrons : Silicon (At. no. 14, Mass no. = 28].

Draw the structure of the following atoms showing the nucleus containing - protons, neutrons and the orbits with the respective electrons : Sodium [At. no. 11, Mass no. 23].

Draw the structure of the following atoms showing the nucleus containing - protons, neutrons and the orbits with the respective electrons : Lithium [At. no. =3, Mass no. = 7].

Draw the structure of the following atoms showing the nucleus containing - protons, neutrons and the orbits with the respective electrons : Isotopes of hydrogen [""_(1)^(1)H,""_(1)^(2)H,""_(1)^(3)H]

The charge on the atom containing 8 protons, 9 neutrons and 9 electrons is

Draw the resonance Structures of Phenol showing the electron shift .

Which of the following atom does not contain the same number of protons and neutrons in its nucleus?

The number of protons, neutrons and electrons in 175_71 Lu , respectively, are:

Thomson proposed that the nucleus of an atom contains protons and neutrons.

Draw the atomic diagrams of the following elements showing the distribution of - protons, neutrons & the electrons in the various shells of the atoms. (a) Carbon ""_(6)^(12)C (b) Oxygen ""_(8)^(16)O (c) Phosphorus ""_(15)^(31)P (d) Argon ""_(18)^(40)Ar (e) Calcium ""_(20)^(40)Ca [The upper number represents the - mass number & the lower number the - atomic number e.g. calcium - mass number = 40, atomic number = 20]